Hey Shunka! I was just about to reply when I saw your post! I agree, we used to eat them on cookies and cupcakes when we were kids, too.
Apparently now the FDA cites the fact that they contain heavy metals which can make them harmful to your health. (I'm wondering how many you'd have to eat for them to be harmful?)
htc, There are dragees that are white, and other are "pearlized" which apparently don't contain heavy metals.
Here one source for the pearl-type if you'd like to look at them: